Does anyone else feel like they're two completely different people in one body?

I feel like I could be split in half and form two separate humans with entirely opposing viewpoints, aesthetics, interests, and characteristics. I don't believe I have DID or anything like that in the slightest, I mean being consciously aware of the differences and depending on my mood I am either one or the other. It's confusing to me and people I know sometimes, but I'm wondering if anyone else can relate and if this might be a BPD thing or just me.